8PL9YC72PZ;UNII-8PL9YC72PZ;Terfenadine impurity F [EP];1-(4-(4-(1,1-Dimethylethyl)phenyl)but-3-enyl)-4-(diphenylmethylene)piperidine;Piperidine, 1-(4-(4-(1,1-dimethylethyl)phenyl)-3-buten-1-yl)-4-(diphenylmethylene)-;50707-13-6;TERFENADINE IMPURITY F [EP IMPURITY]